Why do i dont feel like studying?

I get fever in three stages mostly.
Firstly I feel that phlegm thing in the throat , then I get flowing nose and then finally my body temperature shoots slowing me down .Rite now I have that phlegm thing in the throat perhaps due to occasionally indulging in sips of freezingly cold Pepsi throughout the day.
I hope I feel normal when I wake up tomorrow .My mid term exams are beginning tomorrow and they will go up to Friday. Tomorrow is Ecommerce’s turn.